US20030196982A1 - Device for raising and unfolding the mast and for raising the jib of a crane - Google Patents
Device for raising and unfolding the mast and for raising the jib of a crane Download PDFInfo
- Publication number
- US20030196982A1 US20030196982A1 US10/383,529 US38352903A US2003196982A1 US 20030196982 A1 US20030196982 A1 US 20030196982A1 US 38352903 A US38352903 A US 38352903A US 2003196982 A1 US2003196982 A1 US 2003196982A1
- Authority
- US
- United States
- Prior art keywords
- mast
- jib
- jack
- articulated
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
- B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
- B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks
Definitions
- the present invention is concerned with lifting or handling appliances and more particularly with cranes.
- This invention relates more specifically to a motorized device for raising and unfolding the mast and for raising the jib of a crane and even more particularly of a crane with a jib having multiple functions, such as is described by the document FR 2792627 A in the Applicant's name.
- the subject of this document is a crane of modifiable configuration which comprises a mast, mounted on a chassis, and a distributing jib, composed of successive elements articulated on one another about horizontal axes, the first jib element, called a jib foot, itself being articulated about a horizontal axis at the top of the mast.
- This first jib element and, if appropriate, the following element can be brought into a substantially vertical position, in alignment with the raised mast, so as to increase the height of this mast. All the jib elements comprise a rolling track for the same carriage.
- the crane may be used as a crane with a long or shortened, horizontal or inclined distributing jib or else as a crane with a “swan neck” jib, depending on the configuration of the jib elements, the height of the crane also being adjustable according to the number of jib elements brought into the prolongation of the mast.
- the mast may itself be capable of being unfolded and being used in a plurality of positions, and the various configurations of the jib elements may thus be combined with the variable configurations of the mast.
- the foldable mast is composed of two mast elements, to be precise a lower mast element, articulated on the chassis of the crane, and an upper mast element, articulated on the top of the lower mast element.
- the lower mast element is articulated on a revolving chassis orientable about a vertical axis on a basic chassis mounted an wheels, the crane thus being capable of taking the form of an independent rolling appliance.
- the motorized raising and unfolding device comprises a jack located between the two elements of the mast and articulated, on the one hand, on the lower part of the lower mast element and, on the other hand, on the lower part of the upper mast element by means of a rod assembly.
- the unfolding of the mast is carried out with the aid of this rod assembly.
- the raising of the jib is carried out with the aid of a tie connected, on the one hand, to a fixed point of the revolving chassis of the crane and, on the other hand, to a fixed point of the jib.
- the jack placed between the two mast elements possesses considerable bulk which is obstructive particularly in the folded transport position of the crane.
- the present invention is aimed at avoiding the disadvantages set out above by providing an improved device for raising and unfolding the mast and for raising the jib of a crane, said device being more particularly suitable for a crane with a jib having multiple functions, this device comprising a minimum number of jacks capable of being used both for raising/unfolding and for the work of the crane, by making it possible to have various configurations of this crane, while at the same time possessing a small bulk, particularly for reducing the height of the crane in the folded transport position.
- the subject of the invention is a motorized device for raising and unfolding the mast and for raising the jib of a crane of the type in question, this device comprising essentially a double-action hydraulic jack, the two ends of which are connected respectively to a lower rod assembly and to a upper rod assembly, the lower rod assembly intended for raising and unfolding the mast being also connected to the lower part of the upper mast element and to the upper part of the lower mast element, and the upper rod assembly intended for raising the jib and for moving it into various working positions being also connected to the upper part of the upper mast element and to the jib foot, the device also comprising at least one guy connecting the lower part of the upper mast element to a point of the chassis of the crane on which the lower part of the lower mast element is articulated, and means for locking the lower end of the abovementioned jack, in at least two separate positions, on the lower part of the upper mast element, and, finally, a stop located in the upper part of the upper mast element and provided for cooper
- the inventive idea involves providing a single jack, associated with two rod assemblies, for performing both the functions of unfolding/folding the mast, of raising/lowering the jib and of working with “luffing motion”, that is to say with a jib raising movement.
- the two locking positions of the jack occur respectively in the “mast unfolded” position and in the “mast folded” position.
- the proposed system possesses simple and reliable kinematics: it does not entail either a combination of movements or manual action on its functioning. It also affords complete independence of the movements and positions of the mast and of the jib, thus allowing all possible configurations, particularly from a position with the mast folded substantially horizontally or from a position with the mast unfolded substantially vertically.
- the need for a single jack for various movements or functions also leads to economical implementation.
- the jack is not positioned between the two mast elements when these are folded, but, instead, it rests on the upper mast element, thus making it possible to increase the driver's angle of sight from his cab.
- the lower rod assembly comprises a first rod, preferably a double rod, articulated at one or its ends on the corresponding end of the jack, articulated at an intermediate point on the lower part of the upper mast element and articulated at its other end on one end of a second rod, preferably a double rod, itself articulated at its other end on the upper part of the lower mast element.
- the latter advantageously comprises a bent rod, preferably a double rod, articulated at one of its ends on the upper part of the upper mast element and articulated, at its other end, both on the corresponding end of the jack and on one end of another rod, preferably a single rod, the other end of which is articulated on the jib foot.
- the bent rod here allows the upper rod assembly to “bypass” the articulation of the jib foot on the top of the mast.
- the means for locking the lower end of the jack on the lower part of the upper mast element comprise in a particular embodiment:
- a transverse bolt consisting of a double-acting auxiliary jack, the body and stem of which are respectively integral with two opposite axles mounted slideably in the respective lateral parts of a head of the main jack, a safety spring being provided for keeping the bolt in the active position;
- a guide assembly composed of two slideways which are parallel to this mast element and are equipped respectively with lower and upper broaching holes corresponding to one another, the head of the jack being mounted displaceably between the two slideways, the lower broaching holes of which are provided for receiving respectively the two axles of the bolt in the “mast folded” position and the upper broaching holes of which are provided for receiving respectively the two axles of the bolt in the “mast unfolded” position.
- the locking means have the function of not introducing useless stresses into the lower rod assembly, particularly by preventing the rotation of the first rod (three-point) of this rod assembly in the folded transport position.
- the main jack makes it possible not only to raise the mast and the jib foot when the crane is initially being put in place, but also to obtain all intermediate jib positions via control of the greater or lesser extension of the stem of this jack.
- the jib is itself composed of two or more elements articulated on one another, the unfolding of these jib elements in relation to one another is obtained by means of auxiliary motorization, in particular by jack and rod assembly, with which the present invention is not directly concerned.
- FIG. 1 is a side view of a crane equipped with the device according to the invention, in folded transport position;
- FIGS. 2, 3, 4 , 5 and 6 are aide views, similar to FIG. 1, illustrating successive phases in the raising and unfolding the mast and in the raising of the jib of this crane;
- FIGS. 7, 8 and 9 are side views of the same crane in various working positions
- FIG. 10 is a side view of the raising and unfolding device according to the invention, illustrated alone and in more detail, in the folded position;
- FIG. 11 is a perspective view corresponding to FIG. 10;
- FIG. 12 shows, in perspective, in large detail A of FIG. 11, relating to the locking means of the jack;
- FIGS. 13 and 14 are sectional views of these locking means in two positions
- FIG. 15 is a perspective view of the device, in the unfolded position.
- the crane illustrated in the drawing in various positions possesses a basic carrying chassis 1 mounted so as to roll on wheels 2 and provided with stabilizers 3 .
- a revolving chassis 4 orientable about a vertical axis 5 and provided with a driver's cab 6 on one of its sides.
- a foldable mast 7 composed of a lower mast element a and of a upper mast element 9 , each of polygonal cross section and of caisson-type structure
- the lower mast element 8 is articulated by means of its base, about a horizontal axis 10 on a lower part of the revolving chassis 4 .
- the upper mast element 9 is articulated by means of its base, about a horizontal axis 12 , on the top of the lower mast element 8 , this intermediate joint of the mast 7 allowing a relative pivoting of the elements 8 and 9 through an angle of approximately 180°.
- the foldable mast 7 is held by means of a double guy 13 which connects the base of the upper mast element 9 to the upper part of the revolving chassis 4 .
- the foldable mast 7 carries a distributing jib 14 which is composed of three successive jib elements 15 , 16 and 17 , each of caisson-type structure, which all three comprise, level with their lower face, a rolling track 18 for a jib carriage 19 .
- the first jib element 15 also called a jib foot, is articulated at its rear end, about a horizontal axis 20 , at the top of the upper mast element 9 , this joint allowing a relative pivoting through an angle of approximately 180°.
- the second jib element 16 is articulated by means of its rear end, about a horizontal axis 21 , on the front end of the jib foot 15 .
- the third jib element 17 also designated as the jib point, is articulated by means of its rear end, about a horizontal axis 22 , on the front end of the second jib element 16 .
- the crane is provided with a motorized device, designated as a whole by 23 , for raising and unfolding its mast 7 and for raising its jib 14 .
- the device 23 comprises a hydraulic jack 24 , a lower rod assembly 25 and an upper rod assembly 26 .
- the hydraulic jack 24 which is a double-acting jack, possesses a body 27 , the end of which is connected to the lower rod assembly 25 , and a stem 26 , the end of which is connected to-the upper rod assembly 26 .
- the lower rod assembly 25 comprises a three-point double rod 29 which is articulated:
- the double rod 33 is articulated, about an axis 34 , on the upper part of the lower mast element 8 .
- the upper rod assembly 26 comprises a bent double rod 35 which is articulated:
- the single rod 38 is articulated at its other end, about an axis 39 , on the jib foot 15 .
- the abovementioned double guy 13 also participates in the raising and unfolding device 23 by forming a deformable quadrilateral with: the lower part of the upper mast element 9 , the whole of the lower mast element 8 and the revolving chassis 4 .
- the device 23 also comprises a system 40 for locking the lower end of the jack 24 , that is to say the end of the body 27 of this jack 24 , this locking system 40 0 being located at the base of the upper mast element 9 and being illustrated more particularly in FIGS. 12 to 14 .
- the locking system 40 comprises a bolt 41 located at the end of the body 27 of the jack 24 , said end forming a widened head 42 .
- the bolt 41 is composed:
- a safety spring 46 integrated into the auxiliary jack 43 and acting in the direction of extension of the stem of this jack, that is to say in the direction of separation of the two axles 44 and 45 .
- the locking system 40 also comprises a guide assembly composed of two parallel slideways 47 and 48 carried by the upper mast element 9 and also extending parallel to this mast element 9 .
- the two slideways 47 and 48 are equipped with broaching holes corresponding to one another, which comprise, on the one hand, a pair of lower broaching holes 49 and, on the other hand, a pair of upper broaching holes 50 .
- the two axles 44 and 45 of the bolt 41 are intended to be engaged into the lower broaching holes 49 (in the “mast folded” position) or into the upper broaching holes 50 (in the “mast unfolded” position), the jack head 42 being mounted displaceably between the two slideways 47 and 48 .
- the device 23 comprises a stop 51 located at the top of the upper mast element 9 (see FIGS. 2 and 3) and cooperating with the upper rod assembly 26 , more particularly with the bent double rod 35 , so as to effect a stopping of rotation of this rod 35 in certain operating phases.
- FIGS. 2 to 4 the raising and unfolding of the mast 7 are carried out first of all, as shown in FIGS. 2 to 4 .
- the jack 24 is controlled in the direction of the retraction of its stem 28 , thus actuating the lower rod assembly 25 by causing the rods 29 and 33 or the latter to pivot, while the upper rod assembly 26 remains in bearing contact on the stop 51 .
- This movement brings about the simultaneous raising and unfolding of the two mast elements 8 and 9 , likewise with the aid of the above-mentioned deformable quadrilateral, one of the sides of which consists of the double guy 13 .
- FIGS. 2 and 3 show intermediate positions during raising and unfolding, while FIG.
- the raising and unfolding of the jib 14 are carried out, commencing with the raising of the jib foot 15 .
- the jack 24 is controlled in the direction of extension of its stem 28 , thus actuating the upper rod assembly 26 and causing the raising of the jib foot 15 into a substantially horizontal position, in fact a position slightly inclined upward (for example, at an angle of approximately 5°)—see FIG. 5.
- the intermediate element 16 of the jib 14 and the jib point 17 then remain folded on the jib foot 15 .
- All intermediate jib positions such as that of FIG. 7, the jib 14 remaining aligned, may be obtained between the substantially horizontal position (FIG. 6) and a substantially vertical position (FIG. 8).
- the operations of raising and unfolding the mast 7 and the jib 14 and the opposite folding and lowering operations are carried out to an automatic cycle governed by a control/command unit comprising a computer.
- the latter triggers the sequence of movement commands, taking into account information supplied by the set of sensors, for example force, position and speed sensors, in order to execute a cycle of preprogrammed movements, each phase of which is monitored by sensors which permit the command of the following phase or not.
- the crane may also be used in another configuration, illustrated in FIG. 9, in which its mast 7 is partially unfolded and brought to bear on the revolving chassis by means of a rear prop 52 .
- This configuration allows a distribution of the loads which is associated with a possibility of displacement of the basic carrying chassis 1 , for example for the loading and unloading of trucks.
- the longitudinal axis of the jib 14 is advantageously offset laterally with respect to the longitudinal axis of the mast 7 and also with respect to the device 23 , the jib foot 15 thus being located at the side of the upper rod assembly 26 .
- the single rod 38 of the upper rod assembly 26 is articulated about an axis 39 integral with yokes of a crossmember 53 welded laterally to the jib foot 15 .
- the mast and the jib elements in the form of structures of any shape and cross section, for example with a lattice-type structure instead of a caisson-type structure;
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
Description
- The present invention is concerned with lifting or handling appliances and more particularly with cranes. This invention relates more specifically to a motorized device for raising and unfolding the mast and for raising the jib of a crane and even more particularly of a crane with a jib having multiple functions, such as is described by the document FR 2792627 A in the Applicant's name.
- The subject of this document is a crane of modifiable configuration which comprises a mast, mounted on a chassis, and a distributing jib, composed of successive elements articulated on one another about horizontal axes, the first jib element, called a jib foot, itself being articulated about a horizontal axis at the top of the mast. This first jib element and, if appropriate, the following element can be brought into a substantially vertical position, in alignment with the raised mast, so as to increase the height of this mast. All the jib elements comprise a rolling track for the same carriage. Thus, the crane may be used as a crane with a long or shortened, horizontal or inclined distributing jib or else as a crane with a “swan neck” jib, depending on the configuration of the jib elements, the height of the crane also being adjustable according to the number of jib elements brought into the prolongation of the mast.
- In such a crane with a jib having multiple functions, the mast may itself be capable of being unfolded and being used in a plurality of positions, and the various configurations of the jib elements may thus be combined with the variable configurations of the mast. In particular, the foldable mast is composed of two mast elements, to be precise a lower mast element, articulated on the chassis of the crane, and an upper mast element, articulated on the top of the lower mast element. In particular, the lower mast element is articulated on a revolving chassis orientable about a vertical axis on a basic chassis mounted an wheels, the crane thus being capable of taking the form of an independent rolling appliance.
- For motorizing the various joints of such a crane, the abovementioned document provides devices with a jack or with a jack and a rod assembly. This results in a multiplicity of jacks and of rod assemblies, bearing in mind the total number of joints to be motorized.
- As another known example of the motorization of the unfolding of a foldable crane, mention may also be made of the document FR 2682096 A in the Applicant's name. This document is concerned with a crane which comprises is a foldable mast consisting of two elements and a jib consisting of two main elements. For such a crane structure, the motorized raising and unfolding device comprises a jack located between the two elements of the mast and articulated, on the one hand, on the lower part of the lower mast element and, on the other hand, on the lower part of the upper mast element by means of a rod assembly. The unfolding of the mast is carried out with the aid of this rod assembly. The raising of the jib is carried out with the aid of a tie connected, on the one hand, to a fixed point of the revolving chassis of the crane and, on the other hand, to a fixed point of the jib.
- Such a technique has various disadvantages:
- The jack placed between the two mast elements possesses considerable bulk which is obstructive particularly in the folded transport position of the crane.
- The movements of the raining/unfolding of the mast and of the raising of the jib are simultaneous and do not make it possible to change configuration during the work of the crane, the working configuration being obligatorily predefined before the raising and unfolding of the crane.
- At all events, proceeding from this crane design, two motorization systems must be provided, to be precise; a system for raising and unfolding the mast and for raising the jib, since these movements are associated, and a system for unfolding the jib, and the device considered here cannot be applied directly to a crane with a jib having multiple functions.
- The present invention is aimed at avoiding the disadvantages set out above by providing an improved device for raising and unfolding the mast and for raising the jib of a crane, said device being more particularly suitable for a crane with a jib having multiple functions, this device comprising a minimum number of jacks capable of being used both for raising/unfolding and for the work of the crane, by making it possible to have various configurations of this crane, while at the same time possessing a small bulk, particularly for reducing the height of the crane in the folded transport position.
- For this purpose, the subject of the invention is a motorized device for raising and unfolding the mast and for raising the jib of a crane of the type in question, this device comprising essentially a double-action hydraulic jack, the two ends of which are connected respectively to a lower rod assembly and to a upper rod assembly, the lower rod assembly intended for raising and unfolding the mast being also connected to the lower part of the upper mast element and to the upper part of the lower mast element, and the upper rod assembly intended for raising the jib and for moving it into various working positions being also connected to the upper part of the upper mast element and to the jib foot, the device also comprising at least one guy connecting the lower part of the upper mast element to a point of the chassis of the crane on which the lower part of the lower mast element is articulated, and means for locking the lower end of the abovementioned jack, in at least two separate positions, on the lower part of the upper mast element, and, finally, a stop located in the upper part of the upper mast element and provided for cooperating with the upper rod assembly.
- Thus, the inventive idea involves providing a single jack, associated with two rod assemblies, for performing both the functions of unfolding/folding the mast, of raising/lowering the jib and of working with “luffing motion”, that is to say with a jib raising movement. The two locking positions of the jack occur respectively in the “mast unfolded” position and in the “mast folded” position. The proposed system possesses simple and reliable kinematics: it does not entail either a combination of movements or manual action on its functioning. It also affords complete independence of the movements and positions of the mast and of the jib, thus allowing all possible configurations, particularly from a position with the mast folded substantially horizontally or from a position with the mast unfolded substantially vertically.
- The need for a single jack for various movements or functions also leads to economical implementation. Moreover, the jack is not positioned between the two mast elements when these are folded, but, instead, it rests on the upper mast element, thus making it possible to increase the driver's angle of sight from his cab.
- According to one embodiment of the device which is the subject of the invention, the lower rod assembly comprises a first rod, preferably a double rod, articulated at one or its ends on the corresponding end of the jack, articulated at an intermediate point on the lower part of the upper mast element and articulated at its other end on one end of a second rod, preferably a double rod, itself articulated at its other end on the upper part of the lower mast element.
- As regards the upper rod assembly, the latter advantageously comprises a bent rod, preferably a double rod, articulated at one of its ends on the upper part of the upper mast element and articulated, at its other end, both on the corresponding end of the jack and on one end of another rod, preferably a single rod, the other end of which is articulated on the jib foot. The bent rod here allows the upper rod assembly to “bypass” the articulation of the jib foot on the top of the mast.
- The means for locking the lower end of the jack on the lower part of the upper mast element comprise in a particular embodiment:
- on the one hand, at the lower end of the jack, a transverse bolt consisting of a double-acting auxiliary jack, the body and stem of which are respectively integral with two opposite axles mounted slideably in the respective lateral parts of a head of the main jack, a safety spring being provided for keeping the bolt in the active position;
- on the other hand, on the lower part of the upper mast element, a guide assembly composed of two slideways which are parallel to this mast element and are equipped respectively with lower and upper broaching holes corresponding to one another, the head of the jack being mounted displaceably between the two slideways, the lower broaching holes of which are provided for receiving respectively the two axles of the bolt in the “mast folded” position and the upper broaching holes of which are provided for receiving respectively the two axles of the bolt in the “mast unfolded” position.
- The locking means have the function of not introducing useless stresses into the lower rod assembly, particularly by preventing the rotation of the first rod (three-point) of this rod assembly in the folded transport position.
- The main jack makes it possible not only to raise the mast and the jib foot when the crane is initially being put in place, but also to obtain all intermediate jib positions via control of the greater or lesser extension of the stem of this jack. Inasmuch as the jib is itself composed of two or more elements articulated on one another, the unfolding of these jib elements in relation to one another is obtained by means of auxiliary motorization, in particular by jack and rod assembly, with which the present invention is not directly concerned.
- The invention will be understood more clearly from the following description, with reference to the accompanying diagrammatic drawing illustrating, by way of example, one embodiment of this device for raising and unfolding the mast and for raising the jib of a crane:
- FIG. 1 is a side view of a crane equipped with the device according to the invention, in folded transport position;
- FIGS. 2, 3,4, 5 and 6 are aide views, similar to FIG. 1, illustrating successive phases in the raising and unfolding the mast and in the raising of the jib of this crane;
- FIGS. 7, 8 and9 are side views of the same crane in various working positions;
- FIG. 10 is a side view of the raising and unfolding device according to the invention, illustrated alone and in more detail, in the folded position;
- FIG. 11 is a perspective view corresponding to FIG. 10;
- FIG. 12 shows, in perspective, in large detail A of FIG. 11, relating to the locking means of the jack;
- FIGS. 13 and 14 are sectional views of these locking means in two positions;
- FIG. 15 is a perspective view of the device, in the unfolded position.
- The crane illustrated in the drawing in various positions possesses a
basic carrying chassis 1 mounted so as to roll on wheels 2 and provided withstabilizers 3. Mounted on thebasic chassis 1 is a revolvingchassis 4 orientable about a vertical axis 5 and provided with a driver's cab 6 on one of its sides. - On the other side of the revolving
chassis 4 is mounted afoldable mast 7 composed of a lower mast element a and of aupper mast element 9, each of polygonal cross section and of caisson-type structure Thelower mast element 8 is articulated by means of its base, about ahorizontal axis 10 on a lower part of the revolvingchassis 4. Theupper mast element 9 is articulated by means of its base, about ahorizontal axis 12, on the top of thelower mast element 8, this intermediate joint of themast 7 allowing a relative pivoting of theelements - The
foldable mast 7 is held by means of adouble guy 13 which connects the base of theupper mast element 9 to the upper part of the revolvingchassis 4. - At its top, the
foldable mast 7 carries adistributing jib 14 which is composed of threesuccessive jib elements rolling track 18 for ajib carriage 19. - The
first jib element 15, also called a jib foot, is articulated at its rear end, about ahorizontal axis 20, at the top of theupper mast element 9, this joint allowing a relative pivoting through an angle of approximately 180°. Thesecond jib element 16 is articulated by means of its rear end, about a horizontal axis 21, on the front end of thejib foot 15. Thethird jib element 17, also designated as the jib point, is articulated by means of its rear end, about a horizontal axis 22, on the front end of thesecond jib element 16. - The crane is provided with a motorized device, designated as a whole by23, for raising and unfolding its
mast 7 and for raising itsjib 14. Thedevice 23 comprises ahydraulic jack 24, alower rod assembly 25 and anupper rod assembly 26. - The
hydraulic jack 24, which is a double-acting jack, possesses abody 27, the end of which is connected to thelower rod assembly 25, and astem 26, the end of which is connected to-theupper rod assembly 26. - The
lower rod assembly 25 comprises a three-point double rod 29 which is articulated: - at one of its ends, about an
axis 30, on the end of thebody 27 of thejack 24; - at an intermediate point along its length, about an
axis 31, on the lower part of theupper mast element 9; p1 at its other end, about anaxis 32, on one end of anotherdouble rod 33. - At its other end, the
double rod 33 is articulated, about anaxis 34, on the upper part of thelower mast element 8. - The
upper rod assembly 26 comprises a bentdouble rod 35 which is articulated: - at one of its ends, about an
axis 36, on the upper part of theupper mast element 9; - at its other end, about an axis37, both on one end of a
single rod 38 and on the end of thestem 28 of thejack 24. - The
single rod 38 is articulated at its other end, about anaxis 39, on thejib foot 15. - The abovementioned
double guy 13 also participates in the raising and unfoldingdevice 23 by forming a deformable quadrilateral with: the lower part of theupper mast element 9, the whole of thelower mast element 8 and the revolvingchassis 4. - The
device 23 also comprises a system 40 for locking the lower end of thejack 24, that is to say the end of thebody 27 of thisjack 24, this locking system 40 0being located at the base of theupper mast element 9 and being illustrated more particularly in FIGS. 12 to 14. - The locking system40 comprises a bolt 41 located at the end of the
body 27 of thejack 24, said end forming awidened head 42. The bolt 41 is composed: - of a double-acting auxiliary hydraulic jack43 arranged transversely;
- of two
opposite axles 44 and 45 integral respectively with the body and with the stem of the auxiliary jack 43 and mounted slideably in the lateral parts of thejack head 42; - of a
safety spring 46 integrated into the auxiliary jack 43 and acting in the direction of extension of the stem of this jack, that is to say in the direction of separation of the twoaxles 44 and 45. - The locking system40 also comprises a guide assembly composed of two
parallel slideways upper mast element 9 and also extending parallel to thismast element 9. The twoslideways axles 44 and 45 of the bolt 41 are intended to be engaged into the lower broaching holes 49 (in the “mast folded” position) or into the upper broaching holes 50 (in the “mast unfolded” position), thejack head 42 being mounted displaceably between the twoslideways - Finally, the
device 23 comprises astop 51 located at the top of the upper mast element 9 (see FIGS. 2 and 3) and cooperating with theupper rod assembly 26, more particularly with the bentdouble rod 35, so as to effect a stopping of rotation of thisrod 35 in certain operating phases. - The operation of the
device 23 is established, as follows, starting from the folded crane transport position (FIG. 1): - Initially, the crane is folded on the revolving
chassis 4, and this revolvingchassis 4 is itself locked in terms of orientation on thebasic chassis 1. The assembly consisting of the foldedmast 7 and of the foldedjib 14 takes its place at the side of the driver's cab 6. Thestem 28 of thejack 24 is partially extended. - Starting from this position, the raising and unfolding of the
mast 7 are carried out first of all, as shown in FIGS. 2 to 4. For this purpose, thejack 24 is controlled in the direction of the retraction of itsstem 28, thus actuating thelower rod assembly 25 by causing therods 29 and 33 or the latter to pivot, while theupper rod assembly 26 remains in bearing contact on thestop 51. This movement brings about the simultaneous raising and unfolding of the twomast elements double guy 13. FIGS. 2 and 3 show intermediate positions during raising and unfolding, while FIG. 4 shows the final position obtained when thestem 28 of thejack 24 is retracted completely. The twomast elements lower mast element 8 and at the base of theupper mast element 9. These twomast elements jib 14, up to then, remains folded against themast 7. - The action of the locking system40 during the phase described above will now be described:
- Initially, (FIGS. 1, 12 and13), with the
mast 7 folded, the bolt 41 is locked by means of itsaxles 44 and 45 in the lower broaching holes 49 of theslideways mast elements lower rod assembly 25. Before themast 7 is unfolded, the auxiliary jack 43 is actuated in the direction of the retraction of its stem, and its “stem retracted” position is maintained between theslideways - When the crane reaches the “mast unfolded” position (FIG. 4), the bolt41 is locked by means of its
axles 44 and 45 in the upper broaching holes 50 of theslideways mast elements lower rod assembly 25. - Starting from this position, the raising and unfolding of the
jib 14 are carried out, commencing with the raising of thejib foot 15. For this purpose, thejack 24 is controlled in the direction of extension of itsstem 28, thus actuating theupper rod assembly 26 and causing the raising of thejib foot 15 into a substantially horizontal position, in fact a position slightly inclined upward (for example, at an angle of approximately 5°)—see FIG. 5. Theintermediate element 16 of thejib 14 and thejib point 17 then remain folded on thejib foot 15. - Finally, the complete unfolding of the
jib 14 up to the alignment of its threeelements jib 14 substantially horizontal (FIG. 6). - Other working positions of the crane are obtained by means of the control of the
jack 24 in the direction of extension of its stem 28: - All intermediate jib positions, such as that of FIG. 7, the
jib 14 remaining aligned, may be obtained between the substantially horizontal position (FIG. 6) and a substantially vertical position (FIG. 8). - The substantially vertical position of the jib14 (FIG. 8) is reached when the
stem 28 of thejack 24 comes into abutment in the extension limit position. - The folding and lowering of the
jib 14, and then of themast 7, up to the return to the folded transport position are obtained by means of maneuvers opposite to those described above. - The operations of raising and unfolding the
mast 7 and thejib 14 and the opposite folding and lowering operations are carried out to an automatic cycle governed by a control/command unit comprising a computer. The latter triggers the sequence of movement commands, taking into account information supplied by the set of sensors, for example force, position and speed sensors, in order to execute a cycle of preprogrammed movements, each phase of which is monitored by sensors which permit the command of the following phase or not. - The crane may also be used in another configuration, illustrated in FIG. 9, in which its
mast 7 is partially unfolded and brought to bear on the revolving chassis by means of arear prop 52. This configuration allows a distribution of the loads which is associated with a possibility of displacement of thebasic carrying chassis 1, for example for the loading and unloading of trucks. - Finally, referring to FIG. 15, the longitudinal axis of the
jib 14 is advantageously offset laterally with respect to the longitudinal axis of themast 7 and also with respect to thedevice 23, thejib foot 15 thus being located at the side of theupper rod assembly 26. Thesingle rod 38 of theupper rod assembly 26 is articulated about anaxis 39 integral with yokes of acrossmember 53 welded laterally to thejib foot 15. By virtue of this lateral offset, an additional gain in lateral visibility is obtained for the driver stationed in the driver's cab 6 when the crane is in the folded transport position. - There will be no departure from the scope of the invention, as defined in the accompanying claims:
- by modifying the structural details of the device, for example of its rod assemblies,
- by producing the mast and the jib elements in the form of structures of any shape and cross section, for example with a lattice-type structure instead of a caisson-type structure;
- by modifying the number of successive elements of the jib;
- by applying the device to a crane mounted on a basic chassis or other carrying element of any type and of any form, whether rolling or not;
- by providing, on the crane, any arrangement of driver's cab or station which may differ from the particular example illustrated.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0204606A FR2838415B1 (en) | 2002-04-12 | 2002-04-12 | DEVICE FOR LIFTING AND FILLING THE MAT AND TILTING THE ARROW OF A CRANE |
FR02.04606 | 2002-04-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030196982A1 true US20030196982A1 (en) | 2003-10-23 |
US6991120B2 US6991120B2 (en) | 2006-01-31 |
Family
ID=28052276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/383,529 Expired - Lifetime US6991120B2 (en) | 2002-04-12 | 2003-03-10 | Device for raising and unfolding the mast and for raising the jib of a crane |
Country Status (7)
Country | Link |
---|---|
US (1) | US6991120B2 (en) |
EP (1) | EP1352870B1 (en) |
JP (1) | JP4185802B2 (en) |
DE (1) | DE60312913T2 (en) |
ES (1) | ES2285068T3 (en) |
FR (1) | FR2838415B1 (en) |
RU (1) | RU2307062C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017089700A1 (en) * | 2015-11-27 | 2017-06-01 | David BROENNEC | Lifting device for installing windows |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008007970U1 (en) * | 2008-06-13 | 2008-09-04 | Bauer Maschinen Gmbh | Construction work tool with swiveling mast |
CN101691190B (en) * | 2009-09-29 | 2012-01-04 | 秦皇岛天业通联重工股份有限公司 | Bulk cargo crane |
CN107043078B (en) * | 2017-03-27 | 2018-12-14 | 绍兴明煌科技有限公司 | A kind of folding small-sized electric power equipment take-off and landing device |
FR3125032B1 (en) * | 2021-07-06 | 2023-07-07 | Manitowoc Crane Group France | Crane control method for selecting and applying a preferential load curve according to the inclination of a jib structural element |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4895263A (en) * | 1986-10-27 | 1990-01-23 | Potain, Societe Anonyme | Foldable machine for handling and lifting loads |
US6439408B1 (en) * | 1999-04-23 | 2002-08-27 | Potain | Crane with jib having multiple functions |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1172323A (en) | 1956-02-17 | 1959-02-09 | Tractor trolley, especially for lifting devices | |
IT1164241B (en) * | 1983-05-25 | 1987-04-08 | Luigi Cattaneo Spa | AUTOMATIC LIFTING CRANE |
FR2548646B1 (en) * | 1983-07-05 | 1985-12-13 | Cadillon | FAST FOLDING FOLDABLE CRANE |
FR2731999B1 (en) * | 1995-03-21 | 1997-05-30 | Potain Sa | AUTOMATED MOUNT CRANE WITH LATERAL FOLDABLE BOOM |
FR2765564B1 (en) * | 1997-07-02 | 1999-08-27 | Potain Sa | MATURE FOLDABLE IN THREE ELEMENTS WITH FOLDING / FOLDING DEVICE FOR TOWER CRANE |
EP1172323A1 (en) * | 2000-07-11 | 2002-01-16 | Jean-Marc Yerly | Articulated jib crane |
-
2002
- 2002-04-12 FR FR0204606A patent/FR2838415B1/en not_active Expired - Fee Related
-
2003
- 2003-03-10 US US10/383,529 patent/US6991120B2/en not_active Expired - Lifetime
- 2003-03-10 DE DE60312913T patent/DE60312913T2/en not_active Expired - Lifetime
- 2003-03-10 ES ES03356043T patent/ES2285068T3/en not_active Expired - Lifetime
- 2003-03-10 EP EP03356043A patent/EP1352870B1/en not_active Expired - Lifetime
- 2003-04-10 JP JP2003106906A patent/JP4185802B2/en not_active Expired - Fee Related
- 2003-04-11 RU RU2003110507/11A patent/RU2307062C2/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4895263A (en) * | 1986-10-27 | 1990-01-23 | Potain, Societe Anonyme | Foldable machine for handling and lifting loads |
US6439408B1 (en) * | 1999-04-23 | 2002-08-27 | Potain | Crane with jib having multiple functions |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017089700A1 (en) * | 2015-11-27 | 2017-06-01 | David BROENNEC | Lifting device for installing windows |
FR3044304A1 (en) * | 2015-11-27 | 2017-06-02 | David Broennec | LIFTING DEVICE FOR GLAZING INSTALLATION |
Also Published As
Publication number | Publication date |
---|---|
JP2003306295A (en) | 2003-10-28 |
EP1352870B1 (en) | 2007-04-04 |
US6991120B2 (en) | 2006-01-31 |
EP1352870A1 (en) | 2003-10-15 |
DE60312913T2 (en) | 2007-12-13 |
JP4185802B2 (en) | 2008-11-26 |
RU2307062C2 (en) | 2007-09-27 |
ES2285068T3 (en) | 2007-11-16 |
FR2838415B1 (en) | 2004-10-01 |
DE60312913D1 (en) | 2007-05-16 |
FR2838415A1 (en) | 2003-10-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3939988A (en) | Tower crane | |
DE1944214C3 (en) | Slewing crane undercarriage that can be moved without rails | |
EP3259222B1 (en) | Crane with adjusting unit for influencing a deformation of the jib system | |
US3938670A (en) | Tower crane | |
US6616398B2 (en) | Lift boom assembly | |
WO2006058751A2 (en) | Vehicle crane | |
US20040013504A1 (en) | Straddle carrier | |
US3944081A (en) | Tower crane | |
US4150754A (en) | Utility crane | |
DE3735262C2 (en) | ||
EP0637563B1 (en) | Mobile crane | |
US5704293A (en) | Lifting device for manipulating a track element | |
DE102014012661B4 (en) | Method of operating a crane and crane | |
EP3833627B1 (en) | Vehicle crane system having an attachment part transporting unit for a bracing device, in particular a lateral superlift, of a vehicle crane | |
DE60008307T2 (en) | Multifunction crane with a telescope extender | |
US3934729A (en) | Tower crane | |
US6991120B2 (en) | Device for raising and unfolding the mast and for raising the jib of a crane | |
US5042957A (en) | Moving type three-dimensional road | |
DE9316113U1 (en) | Tower crane | |
WO1990011407A1 (en) | Device for seeing below bridges | |
WO1993011981A1 (en) | Device for pivoting a truck stabilizer jack upwards | |
DE102008013990A1 (en) | Articulated mast for arrangement at chassis of truck for e.g. movable concrete pump, has framework with operating bars hinged at operating joints and lever, and adjustable in length under formation of one of drive aggregates | |
DE19617505A1 (en) | Mobile work machine with outriggers | |
EP2377804A1 (en) | Mobile crane, in particular mobile construction crane | |
EP1524235B1 (en) | Crane and method for errecting its jib |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: POTAIN, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GAILLARD, AIME;REEL/FRAME:013773/0718 Effective date: 20030322 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 12 |